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This preprint discusses the role of crustal anatexis in the formation of porphyry copper deposits during flat-slab subduction in the Laramide Belt of Arizona, USA, between 80-50 Ma. It highlights that Laramide granitic rocks are derived from Proterozoic crust that was pre-enriched in copper and underwent water-fluxed anatexis during this period. The findings challenge traditional models that attribute porphyry copper ore formation to juvenile magmas from the mantle wedge, suggesting instead that crustal pro

Author

williams mata

Language

EN